1 /*
2 * Copyright(c) 2016 - 2018 Intel Corporation.
3 *
4 * This file is provided under a dual BSD/GPLv2 license. When using or
5 * redistributing this file, you may do so under either license.
6 *
7 * GPL LICENSE SUMMARY
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * BSD LICENSE
19 *
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
22 * are met:
23 *
24 * - Redistributions of source code must retain the above copyright
25 * notice, this list of conditions and the following disclaimer.
26 * - Redistributions in binary form must reproduce the above copyright
27 * notice, this list of conditions and the following disclaimer in
28 * the documentation and/or other materials provided with the
29 * distribution.
30 * - Neither the name of Intel Corporation nor the names of its
31 * contributors may be used to endorse or promote products derived
32 * from this software without specific prior written permission.
33 *
34 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
35 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
36 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
37 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
38 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
39 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
40 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
41 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
42 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
43 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
45 *
46 */
47
48 #ifndef HFI1_VERBS_TXREQ_H
49 #define HFI1_VERBS_TXREQ_H
50
51 #include <linux/types.h>
52 #include <linux/slab.h>
53
54 #include "verbs.h"
55 #include "sdma_txreq.h"
56 #include "iowait.h"
57
58 struct verbs_txreq {
59 struct hfi1_sdma_header phdr;
60 struct sdma_txreq txreq;
61 struct rvt_qp *qp;
62 struct rvt_swqe *wqe;
63 struct rvt_mregion *mr;
64 struct rvt_sge_state *ss;
65 struct sdma_engine *sde;
66 struct send_context *psc;
67 u16 hdr_dwords;
68 u16 s_cur_size;
69 };
70
71 struct hfi1_ibdev;
72 struct verbs_txreq *__get_txreq(struct hfi1_ibdev *dev,
73 struct rvt_qp *qp);
74
75 #define VERBS_TXREQ_GFP (GFP_ATOMIC | __GFP_NOWARN)
76 static inline struct verbs_txreq *get_txreq(struct hfi1_ibdev *dev,
77 struct rvt_qp *qp)
78 __must_hold(&qp->slock)
79 {
80 struct verbs_txreq *tx;
81 struct hfi1_qp_priv *priv = qp->priv;
82
83 tx = kmem_cache_alloc(dev->verbs_txreq_cache, VERBS_TXREQ_GFP);
84 if (unlikely(!tx)) {
85 /* call slow path to get the lock */
86 tx = __get_txreq(dev, qp);
87 if (!tx)
88 return tx;
89 }
90 tx->qp = qp;
91 tx->mr = NULL;
92 tx->sde = priv->s_sde;
93 tx->psc = priv->s_sendcontext;
94 /* so that we can test if the sdma decriptors are there */
95 tx->txreq.num_desc = 0;
96 /* Set the header type */
97 tx->phdr.hdr.hdr_type = priv->hdr_type;
98 tx->txreq.flags = 0;
99 return tx;
100 }
101
102 static inline struct sdma_txreq *get_sdma_txreq(struct verbs_txreq *tx)
103 {
104 return &tx->txreq;
105 }
106
107 static inline struct verbs_txreq *get_waiting_verbs_txreq(struct iowait_work *w)
108 {
109 struct sdma_txreq *stx;
110
111 stx = iowait_get_txhead(w);
112 if (stx)
113 return container_of(stx, struct verbs_txreq, txreq);
114 return NULL;
115 }
116
117 static inline bool verbs_txreq_queued(struct iowait_work *w)
118 {
119 return iowait_packet_queued(w);
120 }
121
122 void hfi1_put_txreq(struct verbs_txreq *tx);
123 int verbs_txreq_init(struct hfi1_ibdev *dev);
124 void verbs_txreq_exit(struct hfi1_ibdev *dev);
125
126 #endif /* HFI1_VERBS_TXREQ_H */